Abutted Or Superimposed Members Patents (Class 210/488)
-
Patent number: 6338411Abstract: An arrangement comprising a filter cylinder (1) composed of an approximately horizontally extending alternately superposed array of fixed plates (8) having circular or approximately circular openings, and annular floating plates (9) having geometrically similar openings (13) slightly larger in diameter than the openings in the fixed plates and also having circular outer peripheries, with small filtration clearances defined, the row of openings in the fixed plates defining a cylindrical space having a fixed inner peripheral contour (3), it being arranged that when the row of openings in the floating plates is positioned outside the cylindrical space, at least two equi-level regions in the lower portion of the outer periphery of the floating plate are exposed beyond the outer edge of the fixed plate, a screw (2) extending through the cylindrical space, and eccentric shafts (12) contact-wise supporting the exposed outer peripheral portions of the floating plates and eccentrically rotated, so as to swing the floaType: GrantFiled: July 31, 2000Date of Patent: January 15, 2002Inventor: Toyokazu katabe
-
Patent number: 6338796Abstract: A filter for use in a fuel injection device, the filter having a bore extending along at least a part of its length and comprising a plurality of channels formed in its outer surface, the channels defining, with a housing part for the filter, passages for fuel flowing from an inlet end of the filter to an outlet end of the filter. Each of the channels is in fluid communication with an adjacent one of the channels by means of a clearance passage. The filter also comprises a plurality of radially extending recesses formed at the inlet and outlet ends of the filter, each of the radially extending recesses being in fluid communication with a channel and defining, at least in part, a plurality of inlet and outlet passages for fuel flowing into and out of the channels respectively.Type: GrantFiled: May 18, 2000Date of Patent: January 15, 2002Assignee: Delphi Technologies, Inc.Inventor: Peter Francis Bradford
-
Patent number: 6337026Abstract: A high capacity leukocyte depletion filtration media incorporates a high specific surface area components with a matrix of fibers, yielding a filtration medium that removes leukocytes by at least 99.99%. The filtration medium uses a significantly low weight ratio of high specific surface area components to the matrix of fibers. The high specific area creates a multitude of adhesion sites for leukocytes while the low weight ratios allow good filtration flow rates. The filtration medium is incorporated into a filter device for removing leukocytes from biological fluids.Type: GrantFiled: March 8, 1999Date of Patent: January 8, 2002Assignee: Whatman Hemasure, Inc.Inventors: Eric K. Lee, Paul J. Vernucci, Samuel C. Williams
-
Publication number: 20020000406Abstract: A solid-liquid separating apparatus comprising a cylindrical strainer formed by circular ring members with gaps in between, a casing having the strainer therein, and scrapers disposed in the respective gaps between the circular ring members for removing solid matter adhering to the end (flat) surfaces of the circular ring members. Each of the scrapers comprises a flat auxiliary circular ring member and a flat protruding element. The external diameter of the auxiliary circular ring member is smaller than the external diameter of the circular ring members and is larger than the internal diameter of the circular ring members, and the protruding element extends from the outer circumferential surface of the auxiliary circular ring member. The auxiliary circular ring members are disposed coaxially with the circular ring members, and the tip ends of protruding elements reach the outer circumferences of the circular ring members.Type: ApplicationFiled: May 25, 2001Publication date: January 3, 2002Applicant: IZUMI PRODUCTS COMPANYInventor: Shunji Izumi
-
Patent number: 6332545Abstract: A solid-liquid separating apparatus comprising: a strainer which is in a cylindrical shape formed by a plurality of flat ring members with gaps in between; a casing which has an accommodating section for setting the strainer therein so that the accommodating section is divided by the strainer into a strainer inner region and a strainer outer region, and an intake port that introduces a mixture of a solid and liquid is formed in the strainer outer region and an outlet port that discharges to the outside the liquid that is separated from the solid and passes between the circular ring members and advances into the strainer inner region is formed in the strainer inner region; and a scraper that has plate-form protruding portions with tip ends thereof located in the gaps between the circular ring members of the strainer so as to scrape off the solid matter adhering to the flat surface of the circular ring members.Type: GrantFiled: March 9, 2000Date of Patent: December 25, 2001Assignee: Izumi Products CompanyInventor: Shunji Izumi
-
Publication number: 20010045388Abstract: A soup ladle structure comprises of a soup ladle having a spoon portion with a perforated strainer pore, an elastic element and a stop straining plate; wherein the elastic element is inserted and axially conjoined to handle bodies of the soup ladle and the stop straining plate by means of an axle pin for always maintaining a cover body covering closely on the strainer pore of the soup ladle, while the press handle on the upper end of the stop straining plate makes the cover plate on the lower end lift to open or close tightly on the strainer pore by the axially engaged point and the elastic element to further achieve the purposes of either straining the liquid while leaving the fat for scooping up and removing the floating fat of the broth or only picking up the solid food.Type: ApplicationFiled: May 18, 2001Publication date: November 29, 2001Inventor: Chen-Lung Ho
-
Patent number: 6322698Abstract: A vibratory separation system having a drive mechanism for imparting a vibratory motion to a membrane module to enhance filtration. The membrane module comprises one or more filter elements secured to one another, each having a permeable membrane. The vibratory motion imparted to the membrane module generates a dynamic flow boundary layer at the permeable membranes. This fluid shear boundary layer, in turn, generates lift, thereby inhibiting fouling of the membranes.Type: GrantFiled: August 4, 1998Date of Patent: November 27, 2001Assignee: Pall CorporationInventors: Luis Rios, Tony Alex, Thomas C. Gsell, Michael R. Gildersleeve
-
Patent number: 6319416Abstract: The present invention typically involves the use of a compressed blocking area to assist in sealing a filter element and avoiding channeling in a wound fibrous tissue filtering system. It may involve the use of multiple, spaced, interstitial rings. It may involve the intentional wasting of a portion of the filter element to create a compressed blocking area. It may also involve the use of different heights of the rings and may include the use of compression and secondary tapers on the rings. The heights and spacing of the rings with respect to the other ring or rings may vary in a certain ratio.Type: GrantFiled: January 17, 2001Date of Patent: November 20, 2001Assignee: Harvard CorporationInventors: Dennis R. Morgan, Edd D. Gryder
-
Patent number: 6319401Abstract: A device for the rapid separation and/or conversion of substrates is disclosed herein. The device include a porous tube (2) disposed inside a tubular sample distributor (3). The tubular sample distributor (3) includes channel structures on its inner surface and is disposed inside a tubular body (4). A tubular sample collector (1) having channel structures on its outer surface is disposed inside the porous tube (2). A circular sample distributor (7) is provided having a circumferential portion and radially extending grooves in conjunction with the channel structures of the tubular sample distributor (3). A circular sample collector (8) is also provided having a circumferential portion and radially extending grooves in conjunction with the channel structures of the tubular sample collector (1). The hollow body (4) is arranged between securing means (5) that provide a sample inlet and outlet in communication with the circular sample distributor (7) and circular sample collector (8), respectively.Type: GrantFiled: March 26, 1999Date of Patent: November 20, 2001Assignee: BIA Separations d.o.o.Inventors: Djuro Josic, Primoz Koselj, Ales Podgronik, Ales Strancar
-
Patent number: 6306299Abstract: A filter and housing for waste water treatment includes a housing having a plurality of coaxially mounted vertically extending sections adaptable to receive a filter cartridge therein. An upper section is provided with an outlet consisting of at least two coaxially aligned rings of preselected diameters wherein the thickness of the rings and the spacing between the rings is sufficient to receive waste water treatment outlets of different diameters. The filter cartridge is comprised of a stacked arrangement of a plurality of disc-dam units wherein each disc-dam unit is provided with a serpentine configured first dam, the first dam extending upwardly from an upper surface of the disc-dam unit, the first dam having terminating ends spaced at outer terminating edges of the disc dam unit to define a cord segment therebetween. The terminating ends are connected by a second dam having a height less than the first dam.Type: GrantFiled: April 6, 2000Date of Patent: October 23, 2001Inventors: Harry L. Nurse, Jr., John Christensen
-
Patent number: 6303032Abstract: ‘A Portable Multi-Strainer (11)’ for a kitchen sink comprising a filter screen (14) having a top and bottom surface, a top grid (12) having openings therein abutting the top surface of the filter screen (14), a bottom grid (15) having openings therein abutting the bottom surface of the filter screen (14), said strainer (11) being sized to cover the entire bottom of said kitchen sink and having a thin edge (18) border (17) adapted for a tight fit to the walls of said sink. The top grid (12) openings therein comprise numerous cells (13) all having top and bottom openings. Cells' (13) bottom openings abutting the top surface of the filter screen (14), ‘coinciding’ with the bottom grid's (15) openings abutting the bottom surface of the filter screen (14), resulting with all cells (13) functioning as many individual strainers, having waste particles retaining inside the cells (13) as water drains through filter screen (14) and the bottom grid's (15) openings.Type: GrantFiled: August 15, 2000Date of Patent: October 16, 2001Inventor: Serafina Genduso
-
Patent number: 6293410Abstract: A no-cure fuel filter and method of making same is disclosed. The no-cure fuel filter utilizes a non-organic, mineral based filter element which replaces the pleated paper type filter element of conventional fuel filters. The no-cure fuel filter may be used for gasoline blended fuels, ethanol blended fuels, diesel fuel blends, propane fuel blends, or methanol fuel blends, and may be used for primary filtration, secondary filtration or final filtration. The no-cure fuel filter comprises a non-organic mineral based filter element disposed along a path of flow of unfiltered fuel in a fuel system of a vehicle. The filter element includes an exterior periphery and an interior periphery and a first end and a second end. The no-cure fuel filter further comprises end caps disposed over and fluidly sealing the first and second ends of the filter element, such that the unfiltered fuel must pass through the filter element from one of the peripheries to the other periphery.Type: GrantFiled: June 29, 1999Date of Patent: September 25, 2001Assignee: Mahle-Parr Filter Systems, Inc.Inventor: Larry D. Forbes
-
Patent number: 6293411Abstract: Supported separation membranes are disclosed wherein the permselective membrane is integral with a polymeric support of non-woven fibers having a particular air permeability, the integral membranes exhibiting far superior lifetimes and retention capability, especially for microorganisms.Type: GrantFiled: September 27, 1999Date of Patent: September 25, 2001Assignee: Sartorius AGInventor: Hans Beer
-
Patent number: 6290068Abstract: A screen assembly for a vibratory separator has been invented, which, in certain aspects, has at least two ridge-valley series of screening material with a plurality of alternating ridges and valleys of screening material, and at least one ridge-valley series of screening material offset from at least one other ridge-valley series of screening material. A screen assembly for a vibratory separator has been invented, which, in certain aspects, has at least one ridge-valley series of screening material, said ridge-valley series including a plurality of ridges each ridge between valleys of a plurality of valleys, and each ridge having a first end spaced apart from a second end, said first end having a top wider than a top of second end.Type: GrantFiled: April 22, 1999Date of Patent: September 18, 2001Assignee: Tuboscope I/P, Inc.Inventors: Thomas C. Adams, Kenneth W. Seyffert, David W. Largent, David L. Schulte, Guy L. McClung, III, Jeffrey E. Walker, Hector M. Murray, James F. Maroney, III, Joseph C. Winkler
-
Patent number: 6283309Abstract: Device for purifying gases or liquids comprises a chamber provided with intakes and outlets, in which filter material is incorporated. Micro organisms are used for the purification. The filter material is a flat mat having large open pores and being made of foamed plastic material, which is rolled-up with a supporting element made of—at least partly—undulated, mutually connected, resilient threads, so that a certain distance between the parts of the mat radially following one another remains free. The rolled-up mat can be fittingly mounted in a supporting structure, such as a pipe. A number of pipes can be stacked within the chamber.Type: GrantFiled: November 22, 1999Date of Patent: September 4, 2001Inventor: Bonno Koers
-
Patent number: 6283305Abstract: For uniformly, satisfactorily, and automatically removing foreign matter that has accumulated on the filter, the apparatus includes a housing having an inflow portion and an outflow portion, a filter having a large number of piled resilient filter chips between which a filtering gap for passage of fluid to be filtered is formed, an actuator for expanding the filtering gap between spring members in backwashing, and a backwashing channel for causing backwash fluid to flow through the filter.Type: GrantFiled: March 2, 2000Date of Patent: September 4, 2001Assignee: SMC CorporationInventors: Yoshihisa Maeda, Go Endo, Takayuki Ishihara
-
Patent number: 6283308Abstract: A bacteriostatic filter cartridge having a porous core member about which is layered a yarn and/or a polyester membrane and/or melt blown web of polypropylene and/or a trilaminate polypropylene membrane, any or all of which may be impregnated with an antimicrobial agent. The filter cartridge is sized so as to fit tightly into a cartridge housing of a fluid filtration system. Fluid passing through the cartridge housing will be filtered by the filter cartridge to remove contaminants from the water and which prevents the growth of bacterial and other microorganisms on the filter media.Type: GrantFiled: October 28, 1998Date of Patent: September 4, 2001Assignee: Microban Products CompanyInventors: Arvind S. Patil, Gilbert Patrick
-
Patent number: 6279751Abstract: A filtration device for removing particulate matter from liquids has a rigid tubular body that terminates in a pair of open ends. The body has a plurality of openings therein, leading to a bore, and a layer of a filtration material, such as a polypropylene mesh, is stretched over the surface of the body. The filtration material has a preferred pore size of between 30 and 60 microns. The body is manufactured from plastic, and has a support means which prevents collapse of the filtration device under pressure. The filtration material is attached near the ends of the body, and a pair of end caps are attached to the ends. The end caps serve as means of fitting the filtration device within equipment such as automated photographic processing apparatus. The materials used to manufacture the filtration device are chosen so as to be resistant to both the physical conditions (such as temperature, pressure and flow rate) and the chemical conditions of the apparatus.Type: GrantFiled: July 10, 2000Date of Patent: August 28, 2001Inventor: Edward Malkin
-
Publication number: 20010013493Abstract: A fluid filtration cell is disclosed which includes a separator disposed between two media elements having outer peripheries which are secured together by an edge seal. The media elements are formed from a material which swells in size due to fluid absorption. The edge seal is formed from a thermoplastic material having a modulus of elasticity which is sufficient to permit radial expansion of the edge seal when the cell media swells in size.Type: ApplicationFiled: February 8, 2001Publication date: August 16, 2001Inventor: John L. Pulek
-
Patent number: 6274055Abstract: An in-line liquid filtration device useable for filtration of blood, blood products or the like includes a housing having an inlet port, an outlet port, at least one filter element disposed in the housing between the inlet port and outlet port so as to filter liquid which flows into the filtration device via the inlet port. The filter element divides the housing into a first chamber and a second chamber. The device allows gases to vent the filtration device through the outlet port. The means may include a flow deflector within the first chamber and/or the second chamber. The means may also include a channel, preferably spiral, within either the first chamber and/or second chamber. The filtration device allows air therein to be purged downstream into either an air collecting bag or into the blood receiving bag without the manipulation of the height of the filtration device or the blood receiving bag.Type: GrantFiled: December 20, 1999Date of Patent: August 14, 2001Assignee: Hemasure, Inc.Inventor: Peter Zuk, Jr.
-
Patent number: 6270668Abstract: The present invention typically involves the use of a compressed blocking area to assist in sealing a filter element and avoiding channeling in a wound fibrous tissue filtering system. It may involve the use of multiple, spaced, interstitial rings. It may involve the intentional wasting of a portion of the filter element to create a compressed blocking area. It may also involve the use of different heights of the rings and may include the use of compression and secondary tapers on the rings. The heights and spacing of the rings with respect to the other ring or rings may vary in a certain ratio.Type: GrantFiled: May 21, 1998Date of Patent: August 7, 2001Assignee: Harvard CorporationInventors: Dennis R. Morgan, Edd D. Gryder
-
Patent number: 6267898Abstract: A leukocyte-removing filter medium which comprises a matrix and ultra-fine fibers having a fiber diameter of less than 1.0 &mgr;m and not less than 0.01 &mgr;m which contains ultra-fine fibers in an amount of less than 50 wt % and not less than 0.1 wt %, the degree of curvature of the ultra-fine fibers being 1.2 or more, and/or the ultra-fine fibers form pores having a roundness of 1.7 or less.Type: GrantFiled: December 27, 1999Date of Patent: July 31, 2001Assignee: Asahi Medical Co., Ltd.Inventors: Tatsuya Fukuda, Jun Tanaka
-
Patent number: 6267251Abstract: A filter is provided for filtering contaminants from a fluid passing through the filter. The filter comprises a silicon substrate having opposing first and second surfaces and a passage extending through it. A first etch resistant material layer is formed on the first substrate surface and includes at least one opening which extends through the first layer and communicates with the substrate passage. A second etch resistant material layer is formed on the second substrate surface and includes a plurality of pores which extend through the second layer and communicate with the substrate passage. The second layer defines a filter layer which filters contaminants from fluid passing through the second layer. A process for forming the filter is also provided.Type: GrantFiled: December 18, 1997Date of Patent: July 31, 2001Assignee: Lexmark International, Inc.Inventor: Carl Edmond Sullivan
-
Patent number: 6241886Abstract: The present invention provides a plasma separation filter capable of easily, speedily and safely separating plasma from a small quantity of blood without damaging blood cell components in the blood. The plasma retains the same protein concentration as in the blood. The present invention also provides a method using such a filter and an apparatus comprising such a filter. The filter of the present invention comprises a micro fiber medium formed of micro fibers with an average hydraulic radius of 0.5 &mgr;m to 3.0 &mgr;m. Such a micro fiber medium is placed in a container having an inlet and an outlet so that a ratio (L/D) of a blood flow passage length (L) to a blood flow passage diameter (D) is 0.15 to 6. The present invention provides such a filter, a plasma separation method using the filter, and a plasma separation apparatus comprising the filter. The present invention can significantly contribute to promote the automation and enhance speediness and safety in clinical tests.Type: GrantFiled: June 7, 1996Date of Patent: June 5, 2001Assignee: Toyo Boseki Kabushiki KaishaInventors: Tomohiro Kitagawa, Hidehiko Sakurai, Takafumi Hayashi, Makoto Ohno
-
Patent number: 6234200Abstract: An apparatus for controlling liquid flow from a holding vessel to a discharge line wherein insoluble material received into the vessel with liquid is intended to be retained in the vessel. The apparatus comprises wall means within which an interior cavity is defined for connection to the discharge line at a location below the surface of liquid in the vessel, apertures spaced along the wall means for admitting liquid from the vessel into the cavity, wall elements between the apertures providing inclined confronting ramps between which pockets are provided such that the liquid therein is relatively quiescent to facilitate movement upwardly of buoyant components of the insoluble material to be deflected by the superior ramp towards the top of the vessel and movement downwardly of non-buoyant components of the insoluble material to be deflected by the inferior ramp towards the bottom of the vessel.Type: GrantFiled: December 14, 1999Date of Patent: May 22, 2001Inventor: Kerry Victor Hall
-
Patent number: 6209728Abstract: A filter medium, which is resiliently expandable in an axial direction and is able to deform the filtration gaps in size in accordance with its expansion, including a compression limiting member for providing required filtration gaps by limiting the amount of compression applied to the filter medium. The filter medium is held by a holder in such a manner that the amount of compression may be adjustable.Type: GrantFiled: August 25, 1999Date of Patent: April 3, 2001Assignee: SMC CorporationInventors: Yoshihisa Maeda, Go Endoh
-
Patent number: 6187184Abstract: A basket for a traveling water screen which includes a top rail with a pair of spaced apart end members at opposite ends of the top rail which are joined to the top rail. A water screen extends between the end members and includes an upper edge portion supported by the top rail, and a lower edge portion opposite the upper edge portion, and opposite edges supported by the spaced apart end members. A lower channel rail extends between the spaced apart end members and supports the lower edge portion of the water screen with the lower channel rail defining an internal channel having a smooth arcuate inner surface. An insert in the form of an elongated member is positioned in the bottom, back downstream side of the channel and forms a quiescent condition in the bottom of said channel when the basket is exposed to a flowing water stream.Type: GrantFiled: July 30, 1999Date of Patent: February 13, 2001Assignee: Niagara Mohawk Power CorporationInventors: Wesley A. Reetz, William J. Hartson, Steven L. Barfuss
-
Patent number: 6186341Abstract: The hydrophilicity of porous separation membranes is maintained by bonding the membranes to thermoplastic fiber substrates at least on their peripheries before the membrane peripheries are sealed in a thermoplastic resin. The membranes are capable of being integrity tested.Type: GrantFiled: May 22, 1998Date of Patent: February 13, 2001Assignee: Sartorius AGInventors: Peter Konstantin, Oscar-Werner Reif, Jürgen Rupp, Peter Soelkner
-
Patent number: 6186342Abstract: Described is a semipermeable capillary having a tubular semipermeable wall composed of a membrane-forming material (2) and a tubular strengthening layer (1). The tubular strengthening layer includes an elongated tape having mutually overlapped longitudinal edges. The tubular strengthening layer has an open cohesive structure that is embedded in the membrane-forming material whereby the mutually overlapping longitudinal edges are joined together by the membrane-forming material and a continuous phase is formed between the semipermeable wall and the strengthening layer.Type: GrantFiled: July 15, 1997Date of Patent: February 13, 2001Assignee: Stork Friesland B.V.Inventor: Casper Johannes N. Rekers
-
Patent number: 6182834Abstract: Filter for removal of leucocytes is provided, wherein the filter is coated with a natural polymer of chitosan which has a good blood compatibility and no side effect in human body on an ultrafine non-woven fabric. This blood filter provides a high removal rate of leucocytes as well as good recovery of platelets and red blood cells due to secondary filtration through electrostatic power between a leucocyte and a cationic residue provided by chitosan on the surface of the non-woven fabric.Type: GrantFiled: March 18, 1998Date of Patent: February 6, 2001Assignee: Korea Institute of Science and TechnologyInventors: Jae-Jin Kim, Sang-Bong Suh, Byung-Ok Jung
-
Patent number: 6177019Abstract: A method for removing tumor cells from tumor cell-contaminated stem cell products is disclosed. One embodiment of the method relies on an in-line filtration device that includes a tumor cell reduction filter means, preferably comprised of one or more tumor cell reduction filter pads. The tumor cell reduction filter means provides at least a ten-fold reduction in tumor cells while allowing for at least a 30% recovery of stem cells in a filtered stem cell product.Type: GrantFiled: February 24, 1999Date of Patent: January 23, 2001Assignee: HemaSure Inc.Inventors: Franco Castino, Sumith R. Wickramasinghe
-
Patent number: 6170671Abstract: The blood filter unit of the invention is composed of a blood filtering material made of glass fiber filter and microporous membrane and a holder having a blood inlet and a filtrate outlet. The holder accommodates the blood filtering material so that the microporous membrane is located on the filtrate outlet side, provides a space between the blood filtering material and the filtrate outlet, and provides a means for preventing adhesion of the blood filtering material on the filtrate outlet side. By using the blood filter unit, a necessary volume of plasma or serum for analysis can be separated surely, irrespective of hematocrit value of the blood.Type: GrantFiled: April 12, 1999Date of Patent: January 9, 2001Assignee: Fuji Photo Film Co., Ltd.Inventors: Masao Kitajima, Kenichiro Yazawa, Shigeru Tezuka, Fumio Sugaya, Akemi Higo, Kiyotaka Fujiwara
-
Patent number: 6168718Abstract: A method for purifying conventionally treated blood plasma to remove substantially all residual leukocytes while maintaining useful flow rates for medically useful amounts of plasma utilizes a disposable, heat-sterilizable filter employing one or more depth-type prefilters and at least one intermediate hydrophilic microporous membrane followed by at least one final hydrophilic microporous membrane having a smaller pore size than the intermediate membrane within a common housing. The purified plasma is preferably subjected to chemical treatment to destroy infectious agents such as hepatitis and HIV.Type: GrantFiled: February 10, 2000Date of Patent: January 2, 2001Assignee: Pall CorporationInventors: Mark Alexander Sutter, Noel Tod Borton, Daniel F. Bischof, John Chapman, Robert E. Herman, Chong-Son Sun
-
Patent number: 6152307Abstract: A screen assembly for a vibratory separator has been invented, the screen assembly, in certain aspects, having a panel with two connected pairs of spaced-apart sides including a first pair of spaced-apart side separated by a second pair of spaced-apart sides, a plurality of spaced-apart strips extending between the first pair of spaced-apart sides, each adjacent pair of the plurality of spaced-apart strips defining a space therebetween through the panel, a first mesh bonded to the spaced-apart strips, and a second mesh bonded to the backup mesh. In one aspect a third mesh is bonded to the second mesh. In one aspect the strips are formed from a panel piece by cutting material therefrom with a laser.Type: GrantFiled: January 11, 1999Date of Patent: November 28, 2000Assignee: Tuboscope I/P, Inc.Inventors: Thomas C. Adams, Kenneth W. Seyffert, David W. Largent, David L. Schulte, Jeffrey E. Walker, Hector M. Murray, Guy L. McClung, III
-
Patent number: 6117341Abstract: A filter has a first filter layer made of TiO.sub.2 of Ti.sub.4 O.sub.7 particles deposited on a second filter layer by stainless steel particles. The first layer has a smaller pore size than the second layer. The construction of the filter, the relative thicknesses of the layers and the resistances thereof to movement therethrough of electrolytically generated gas located between the two layers when the filter is permeated with liquid are such that the gas reaches the upstream side of the filter before the downstream side. In one embodiment stainless steel particles are sintered and rolled with a textured roller before ceramic particles are applied and rolled. An intermediate layer of metal particle peaks and ceramic filled troughs is thus provided which has high tortuosity. The resistance to flow at the metal/ceramic interface can be increased by electrodeposition of metal there.Type: GrantFiled: June 20, 1997Date of Patent: September 12, 2000Assignee: Imas Technology Ltd.Inventors: David James Bray, Alexander Philip Davidson
-
Patent number: 6105787Abstract: A filtration device for removing particulate matter from liquids has a rigid tubular body that terminates in a pair of open ends. The body has a plurality of openings therein, leading to a bore, and a layer of a filtration material, such as a polypropylene mesh, is stretched over the surface of the body. The filtration material has a preferred pore size of between 30 and 60 microns. The body is manufactured from plastic, and has a support means which prevents collapse of the filtration device under pressure. The filtration material is attached near the ends of the body, and a pair of end caps are attached to the ends. The end caps serve as means of fitting the filtration device within equipment such as automated photographic processing apparatus. The materials used to manufacture the filtration device are chosen so as to be resistant to both the physical conditions (such as temperature, pressure and flow rate) and the chemical conditions of the apparatus.Type: GrantFiled: April 1, 1998Date of Patent: August 22, 2000Inventor: Edward Malkin
-
Patent number: 6102212Abstract: A filter element for a pressure filter where a substantially horizontal wall (3) divides the interior of a pressure vessel into a lower inlet compartment (5) and an upper outlet compartment (6). A filter element (20) having a filter medium (40) is suspended from the wall (3) such that the filtering takes place from the inlet compartment (5) through the filter element (20) up to the outlet compartment (6). A corrugated sheet (22) is provided which defines a plurality of substantially vertically extending channels (45) and (42). Each first channel (45) is open the inlet compartment (5) with the filter medium (40) covering the first channels (45) with the upper end of the first channels (45) being closed and the lower end of the first channels (45) being open at (43). The second channels (42) being formed on an inner side of the corrugated sheet (22) with an open bottom end and an upper end communicating with the outlet compartment (6).Type: GrantFiled: March 2, 1999Date of Patent: August 15, 2000Assignee: Bandak ASInventor: Kent Strid
-
Patent number: 6071419Abstract: A fluid filter includes a first batting of high loft, non-woven, fibrous fluid-permeable material with a plurality of openings formed through the thickness thereof across the length and width of the batting. A second layer of high loft, non-woven, fluid-permeable fibrous batting is attached to the first layer and extends across the entire length and width of the first layer. Preferably, the first and second layers are adhered together to form a single integral fluid filter. In the preferred form of the invention, the openings in the first batting have side walls which are perpendicular to the upper surface of the batting, such that fluid flow impacts on the upper surface of the batting, rather than directly impacting on the side walls.Type: GrantFiled: October 20, 1993Date of Patent: June 6, 2000Assignee: Products Unlimited, Inc.Inventors: Scott B. Beier, Rex A. Adams
-
Patent number: 6048464Abstract: A leukocyte-removing filter material is described, which includes a porous element having fine pores of an average pore diameter of not less than 1.0 .mu.m but less than 100 .mu.m and a fiber structure composed of a plurality of fibers having an average fiber diameter of not less than 0.01 .mu.m but less than 1.0 .mu.m kept on the porous element. The porosity of the filter material is not less than 50% but less than 95%, and the proportion of the fiber structure to the filter material is not less than 0.01% by weight but less than 30% by weight. The ratio between the average pore diameter of the porous element and the average fiber diameter of the fiber structure is not less than 2 but less than 2,000 and the above fiber structure forms a reticulate structure. A process for producing the leukocyte-removing fiber material and an apparatus for removing leukocyte using the above fiber material are also described.Type: GrantFiled: August 14, 1997Date of Patent: April 11, 2000Assignee: Asahi Medical Co., Ltd.Inventors: Jun Tanaka, Tatsuya Fukuda, Kumi Yoshida
-
Patent number: 6032807Abstract: A method correlates average fiber diameter with performance for a complex filtration media comprising a matrix of fibers having a fibrillated component with a diameter so small (e.g., less than 0.01 microns), that cannot be physically measured with accuracy. The method manufactures a selected matrix, derives the number average diameter of the fibers according to prescribed steps, some of which do not require actual physical measurements, and observes a performance characteristic. The method repeats the foregoing steps for different matrixes, yielding different number average diameters. The method expresses change in the selected performance characteristic as a function of change in number average diameter of the matrices.Type: GrantFiled: August 21, 1996Date of Patent: March 7, 2000Assignee: Baxter International Inc.Inventors: Shmuel Sternberg, Daniel R. Lynn
-
Patent number: 6030539Abstract: An in-line liquid filtration device useable for filtration of blood, blood products or the like includes a housing having an inlet port, an outlet port, at least one filter element disposed in the housing between the inlet port and outlet port so as to filter liquid which flows into the filtration device via the inlet port. The filter element divides the housing into a first chamber and a second chamber. The device allows gases to vent the filtration device through the outlet port. The means may include a flow deflector within the first chamber and/or the second chamber. The means may also include a channel, preferably spiral, within either the first chamber and/or second chamber. The filtration device allows air therein to be purged downstream into either an air collecting bag or into the blood receiving bag without the manipulation of the height of the filtration device or the blood receiving bag.Type: GrantFiled: November 19, 1997Date of Patent: February 29, 2000Assignee: HemaSure, Inc.Inventor: Peter Zuk, Jr.
-
Patent number: 6000558Abstract: A filter element for filtering a particle-containing paint composition or a particle loading slurry composition which is a precursor to a particle-containing paint composition is provided. The filtration element comprises at least one filtration layer formed from woven polymer fibers and having substantially uniform pores and two spacer layers. The spacer layers have raised projections to create a space between adjacent spacer layers having contacting projections. The filtration element has a pleated or spirally wound configuration.Type: GrantFiled: October 9, 1997Date of Patent: December 14, 1999Assignee: Millipore CorporationInventors: Stephen Proulx, Michael L. Heise
-
Patent number: 5996811Abstract: This invention relates to a plasma-collecting device which comprises a blood filtering material comprising glass fiber filter and microporous membrane, a holder having a blood inlet and a plasma outlet accommodating the blood filtering material, a blood-collecting needle being connected to the blood inlet, and a plasma receiver being provided on the plasma outlet side. The plasma-collecting device can collect a necessary amount of plasma for analysis from blood vessel directly, easily and surely.Type: GrantFiled: December 19, 1997Date of Patent: December 7, 1999Assignee: Fuji Photo Film Co. Ltd.Inventors: Masao Kitajima, Akemi Higo
-
Patent number: 5997972Abstract: Filling material for percolating filters used in the biological treatment of fluids are provided with strips which are made of plastic and are connected to one another via a transversely directed holding web. The strips are arranged one above the other in a plurality of layers in order to increase the strip density. In the filling material according to the invention, the strips are provided with different cross-sections over their length. For example, the strips may be reduced in width in regions adjacent to their connection to the holding web. As a result, the strips can be arranged in one layer with an increased strip density.Type: GrantFiled: August 17, 1994Date of Patent: December 7, 1999Assignee: Norddeutsche Seekabelwerke AktiengesellschartInventor: Hartwig Basse
-
Patent number: 5989417Abstract: A cover for a sewage shaft comprising a shaft lid (1) including apertures (2) for the passage of sewage, a filtering element (3) spanning the region of the apertures (2) being arranged at the lower side of this lid, wherein the filtering element (3) projects into the apertures (2) and, at its upper side, ends substantially flush with the upper side of the shaft lid (1).Type: GrantFiled: November 16, 1998Date of Patent: November 23, 1999Inventor: Gerhard Fleischhacker
-
Patent number: 5988397Abstract: A screen for a vibratory shaker having a frame with multiple openings. Screen modules or plugs are disposed in each opening. Further disclosed is a mounting apparatus for securing the screen plugs in the openings and a support strip for supporting part of a screen having at least one upturned finger projecting above the top surface of the support body configured for contacting and supporting at least a part of a raised portion of the frame. A plug or module disposed in an opening of a positioning member of a screen assembly for a vibratory separator receives fluid with material therein for separation therefrom. Additionally disclosed is a method for making a plate mesh combination.Type: GrantFiled: July 17, 1997Date of Patent: November 23, 1999Assignee: Tuboscope I/P, Inc.Inventors: Thomas C. Adams, David L. Schulte, Jr., Guy L. McClung, III
-
Patent number: 5988400Abstract: A porous fluorocarbon membrane has a porous support completely impregnated with tetrafluoroethylene/vinylidene fluoride copolymer. There is a process for producing this membrane by impregnating a porous support with a copolymer solution in a readily-boiling solvent and a precipitating mixture of alcohol and water followed by curing for partial hardening of the solution and subsequent drying at elevated temperature. A cartridge filter includes protective and supporting cylindrical perforated hollow housings, containing a fluorocarbon membrane or two superimposed flourocarbon membranes. Membranes and a cartridge filter find extensive use in separation of gases and aggressive media.Type: GrantFiled: June 20, 1997Date of Patent: November 23, 1999Assignee: Aktsionernoe Obschestvo "Polimersintez"Inventors: Vyacheslav Grigorievich Karachevtcev, Vladimir Pavlovich Dubjaga, Natalia Vladimirovna Amelina, Aleksandr Valentinovich Tarasov
-
Patent number: 5985139Abstract: A pump and filter system for filtering effluent in a septic system including a filter housing with sides, a top and a bottom, a filtering system secured within the filter housing, a vertical tubular element secured to the outside of the filter housing in communication with unfiltered effluent within the septic system and with an opening in the bottom or side of the filter housing, and a pump for pumping filtered effluent through the filtering system. Preferably a check valve is secured within the bottom of the filter housing.Type: GrantFiled: January 26, 1998Date of Patent: November 16, 1999Assignee: Zoeller CompanyInventor: Kenneth E. Zoeller
-
Patent number: 5979669Abstract: A blood filter unit having a blood filter holder containing a blood filtering material of a glass fiber filter and a microporous membrane is described. The holder has a blood inlet and a filtrate outlet, and accommodates the blood filtering material so that the microporous membrane is located on the filtrate outlet side and has a space between the blood filtering material and the filtrate outlet. The holder provides means for preventing adhesion of the blood filtering material on the filtrate outlet side. The inventive blood filter unit allows separation of a desired volume of plasma or serum for analysis without interference by the hematocrit value of the blood.Type: GrantFiled: January 17, 1997Date of Patent: November 9, 1999Assignee: Fuji Photo Film Co., Ltd.Inventors: Masao Kitajima, Kenichiro Yazawa, Shigeru Tezuka, Fumio Sugaya, Akemi Higo, Kiyotaka Fujiwara
-
Patent number: 5972218Abstract: An apparatus for the conversion of substrates both for analytical and preparative purposes in a flow-through and cross-flow reactor having compact porous discs and/or compact porous tubes as carrier for conversion reaction or preparative separations which compact porous discs and/or compact porous tubes are modified with substances being capable of specifically binding and/or converting said substrates by distributing the samples to be converted and/or preparatively separated and collecting the converted and/or separated substrates preferably in a low volume, wherein the distribution of the sample does not affect the carrier adversely.Type: GrantFiled: August 23, 1995Date of Patent: October 26, 1999Assignee: BIA d.o.o. Laboratory and Process Equipment Co., Ltd.Inventors: Djuro Josic, Primoz Koselj, Ales Podgronik, Ales Strancar